Description
Boiler Used High Temperature Draft Fan
Reliable Draft for Demanding Boiler Applications. Engineered to withstand intense thermal loads and safeguard continuous hot-gas extraction.
Product Specifications
Complete performance parameters, outline drawings, and dimensional data for the LWHTIDF5-47 series.
| Model | Matching Motor (kW-p) | Speed (r/min) | Voltage (V) | Flow Rate (m³/h) | Total Pressure (Pa) |
|---|---|---|---|---|---|
| LWHTIDF5-47-1.35A-0.25-2P-1-001 | 0.25 | 2800 | 220/380 | 410 | 470 |
| LWHTIDF5-47-1.35A-0.37-2P-1-002 | 0.37 | 2800 | 220/380 | 520 | 700 |
| LWHTIDF5-47-1.6A-0.55-2P-1-001 | 0.55 | 2800 | 220/380 | 680 | 880 |
| LWHTIDF5-47-1.6A-0.75-2P-1-002 | 0.75 | 2800 | 220/380 | 880 | 1050 |
| LWHTIDF5-47-1.6A-1.1-2P-1-003 | 1.1 | 2800 | 220/380 | 1250 | 1240 |
| LWHTIDF5-47-2.1A-1.5-2P-1-001 | 1.5 | 2800 | 220/380 | 1400 | 1350 |
| LWHTIDF5-47-2.1A-2.2-2P-1-002 | 2.2 | 2800 | 380 | 1800 | 1830 |
| LWHTIDF5-47-2.5A-3-2P-1-001 | 3 | 2800 | 380 | 2500 | 2520 |
| LWHTIDF5-47-2.5A-4-2P-1-002 | 4 | 2800 | 380 | 3100 | 2900 |
| LWHTIDF5-47-2.5A-5.5-2P-1-003 | 5.5 | 2800 | 380 | 3680 | 3200 |
| LWHTIDF5-47-2.5A-7.5-2P-1-004 | 7.5 | 2800 | 380 | 4300 | 3500 |
| Model | Power (W) | D1 | D2 | D3 | A1 | A2 | A3 | B1 | B2 | B3 | C | E | H | K | N | F | M | G | L1 | L2 | N1-D1 | N2-D2 | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWHTIDF5-47-1.35A | 250 | 135 | 180 | 210 | 95 | 132 | 161 | 98 | 133 | 165 | 80 | 100 | 63 | 123 | 151 | 135 | 300 | 357 | 106 | 417 | 6-Φ11 | 4-Φ10 | 14 |
| LWHTIDF5-47-1.35A | 370 | 135 | 180 | 210 | 80 | 120 | 146 | 115 | 150 | 175 | 90 | 112 | 71 | 142 | 166 | 160 | 344 | 395 | 98 | 425 | 6-Φ11 | 4-Φ10 | 18 |
| LWHTIDF5-47-1.6A | 550 | 160 | 200 | 230 | 130 | 170 | 196 | 100 | 130 | 160 | 90 | 112 | 71 | 149 | 166 | 160 | 344 | 395 | 123 | 477 | 6-Φ11 | 4-Φ12 | 19 |
| LWHTIDF5-47-1.6A | 750 | 160 | 200 | 230 | 130 | 170 | 196 | 145 | 180 | 210 | 90 | 112 | 71 | 148 | 187 | 180 | 385 | 440 | 123 | 477 | 6-Φ11 | 4-Φ12 | 24 |
| LWHTIDF5-47-1.6A | 1100 | 160 | 200 | 230 | 130 | 170 | 196 | 145 | 180 | 210 | 100 | 125 | 80 | 149 | 202 | 201 | 415 | 456 | 123 | 497 | 6-Φ11 | 4-Φ12 | 29 |
| LWHTIDF5-47-2.1A | 1500 | 210 | 240 | 270 | 130 | 170 | 196 | 145 | 180 | 210 | 100 | 125 | 80 | 149 | 202 | 201 | 415 | 456 | 123 | 497 | 6-Φ11 | 4-Φ12 | 30 |
| LWHTIDF5-47-2.1A | 2200 | 210 | 240 | 270 | 150 | 190 | 216 | 165 | 200 | 230 | 125 | 140 | 90 | 163 | 228 | 225 | 463 | 506 | 133 | 564 | 6-Φ11 | 4-Φ12 | 42 |
| LWHTIDF5-47-2.5A | 3000 | 250 | 280 | 310 | 150 | 190 | 216 | 230 | 266 | 295 | 140 | 160 | 100 | 210 | 268 | 288 | 577 | 630 | 134 | 595 | 6-Φ11 | 6-Φ12 | 58 |
| LWHTIDF5-47-2.5A | 4000 | 250 | 280 | 310 | 150 | 190 | 216 | 230 | 266 | 295 | 140 | 190 | 112 | 210 | 268 | 288 | 577 | 630 | 134 | 611 | 6-Φ11 | 6-Φ12 | 66 |
| LWHTIDF5-47-2.5A | 5500 | 250 | 280 | 310 | 150 | 190 | 216 | 254 | 290 | 319 | 140 | 216 | 132 | 231 | 294 | 308 | 635 | 685 | 134 | 669 | 6-Φ11 | 6-Φ12 | 87 |
| LWHTIDF5-47-2.5A | 7500 | 250 | 280 | 310 | 150 | 190 | 216 | 254 | 290 | 319 | 140 | 216 | 132 | 231 | 294 | 308 | 635 | 685 | 134 | 669 | 6-Φ11 | 6-Φ12 | 95 |
Durable Steel Casing
Steel casing provides strength, rigidity, and stable fan support; durable for boiler draft and industrial ventilation.
Extracting 200°C flue gas subjects standard blowers to severe thermal expansion and rapid structural degradation. The LWHTIDF5-47 series is built from heavy-gauge carbon steel plates, engineered specifically to resist thermal warping. The reinforced housing easily withstands the intense internal pressures of industrial boilers.
- Carbon Steel — thick plating resists heat-induced deformation
- Protective Coating — guards the exterior against corrosive factory atmospheres
- Reinforced Structure — eliminates panel drumming during high-pressure extraction
Centrifugal Impeller Delivering Steady Airflow
The centrifugal impeller generates airflow and pressure for hot-gas extraction and ventilation in boiler systems. Select the right model based on required airflow and system resistance.
Drawing hazardous exhaust gases through restrictive boiler ducting requires relentless aerodynamic force. This precision-welded impeller is meticulously balanced to prevent material buildup and vibration. It powers through system backpressure, extracting up to 4,300 m³/h smoothly without stalling.
- Steady Extraction — maintains consistent negative pressure inside the furnace
- Vibration Reduction — dynamic balancing protects against rotational stress
- Heat-Resistant Blades — retains structural integrity when moving scalding air
Built for 160°C–200°C Gas Handling
Designed for conveyed gas temperatures of 160–200°C, the LWHTIDF5-47 supports hot-gas extraction in small boiler systems and other suitable high-temperature ventilation applications.
Most industrial blowers suffer motor failure when exposed to extreme thermal transfer. This fan utilizes a unique heat-isolating spacer between the primary volute and the drive section. It safely extracts searing combustion gases directly from the boiler exhaust without compromising the powertrain.
- Hot-Gas Handling — purpose-built to extract 200°C process air continuously
- Boiler Draft — safely pulls flue gases out of active combustion chambers
- Industrial Ventilation — ideal for ovens, kilns, and heat-recovery networks
High-Temperature Motor with Dedicated Cooling
High-Temperature Motor for Reliable Boiler Draft & Hot-Gas Extraction. Independent connecting-section impeller + rear cooling fan for dual-end heat dissipation, less heat buildup, and reliable operation.
This model abandons conventional drive layouts. It inserts a dedicated secondary cooling impeller on the main shaft, completely severing the heat bridge between the 200°C volute and the motor bearings. Combined with the motor's own rear cooling fan, it achieves exceptional thermal protection.
- Dual-End Dissipation — active cooling pushes heat away from sensitive electronics
- Thermal Isolation — independent shaft section prevents direct heat conduction
- Reliable Operation — S1 duty rating for non-stop, high-heat factory environments
Low Noise & Low Vibration
With low-noise and low-vibration operating characteristics, the LWHTIDF5-47 helps reduce disturbance around boiler rooms and ventilation equipment.
High-speed hot gas extraction typically causes extreme mechanical roar. By pairing a perfectly balanced rotor with an ultra-rigid, thickened carbon steel casing, this fan dampens resonance at the source. This prevents structural shaking that ruins bearings and keeps plant acoustic levels compliant.
- Low-Noise Operation — thick casing walls restrict sound transmission
- Low Vibration — precise rotor balancing eliminates eccentric shaft wear
- Stable Performance — protects connected ducting from sympathetic shaking
Reliable Draft for Small Boiler Systems
The centrifugal fan draws hot gases through the boiler exhaust system. Selecting the fan to match the required airflow and system resistance helps achieve the intended operating performance.
Creating a stable vacuum is essential for efficient combustion. This induced draft fan overcomes aerodynamic resistance from flues and heat exchangers, forcibly pulling the hot exhaust out. Its targeted aerodynamic curve prevents flame instability in smaller industrial boiler setups.
- Boiler Induced Draft — reliably extracts smoke to maintain negative furnace pressure
- Hot-Gas Extraction — safely evacuates searing 200°C fumes
- System-Matched Selection — various motor pairings optimize static lift
Two Configurations for Different Installation Needs
Choose According to Your Available Space and Mounting Dimensions.
With Base Frame
Provides heavy-duty base support for rigid positioning and vibration-free mounting directly onto the boiler room floor or structural equipment layout.
Without Base Frame
A streamlined footprint that allows for seamless integration with customized equipment brackets or highly compact machinery mounting structures.
Practical Solutions for Boiler Draft & Ventilation
Built to extract extreme heat safely across intensive processing plants and thermal networks.
Small Boiler Systems
Overcomes aerodynamic drag to evacuate 200°C flue gas and maintain safe negative furnace pressure.
Boiler Rooms
Provides continuous heat dissipation and ambient extraction in confined, high-temperature industrial spaces.
Hot-Gas Exhaust Systems
Dedicated cooling impellers protect the motor while aggressively venting searing fumes from process ovens.
Process Equipment Ventilation
Integrates seamlessly into complex manufacturing lines to draw off hazardous thermal exhaust safely.
Industrial Air Exchange
Forces massive volumes of fresh air through large facilities to combat extreme thermal buildup.
Equipment Heat Dissipation
Mounted directly onto heavy machinery to actively exhaust radiant heat and protect electronic components.
LONGWELL — Trusted Industrial Fan Manufacturer Since 1990
Founded in 1990 in Yuyao, Ningbo — the heart of China’s advanced manufacturing belt — LONGWELL has grown from a precision fan component workshop into a vertically integrated ventilation technology group. Today we engineer AC, DC and EC fan and motor systems with 4,000 m²+ of manufacturing floor, dedicated aerodynamics and CFD simulation labs, and a global export network spanning Europe, the Americas and Asia-Pacific.
From material selection to final balancing, every LONGWELL fan is built on automated lines, computer-balanced impellers and 100% run-test before shipment. We are certified to ISO 9001:2015 and ISO 14001, with CE, UL/ETL, RoHS and EAC compliance, and performance tested to the AMCA 210/211 method.
Production & Delivery
Automated lines, computer-balanced impellers and a 100% run-test on every unit, so each LWHTIDF5-47 fan arrives ready to install.
Global HVAC&R Exhibitions Participation
Meeting boiler manufacturers, project contractors, and OEM engineering teams at international trade fairs worldwide.
Trusted by Leading Global OEM Brands
24+ equipment builders rely on LONGWELL for industrial centrifugal blowers every year.
Complete Range of Professional & Certified
LONGWELL fans are independently certified to international quality, safety and energy-efficiency standards.
Global Market & Client Preference
The LWHTIDF5-47 series is specified by boiler manufacturers and industrial clients across Europe, the Middle East, Southeast Asia and the Americas.
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View Product →Frequently Asked Questions
Quick technical answers about the LWHTIDF5-47 high temperature draft fan.
What temperature range can the LWHTIDF5-47 fan handle?
This specialized high-temperature draft fan is engineered to convey hot exhaust gases ranging from 160°C up to 200°C continuously in industrial boiler and kiln environments.
How does the fan protect the motor from extreme heat?
It features a unique heat-isolating design. The fan uses an independent connecting-section impeller acting as a dedicated cooling fan, providing dual-end heat dissipation to prevent thermal transfer from the hot volute to the motor bearings.
What are the mounting options available?
It can be configured with a rigid base frame for straightforward floor mounting, or without a base frame to allow for direct integration into customized equipment brackets and compact machinery layouts.
Is the fan casing durable enough for boiler draft applications?
Yes, the casing is fabricated from premium carbon steel with reinforced structural elements. A specialized heat-resistant protective coating guards against the corrosive and abrasive conditions typical in boiler flue exhaust.
Need a Quote or Custom Specs?
Send us the air volume, total pressure, and installation layout. Our engineers will match the right LWHTIDF5-47 model and reply within 24 hours.
